Question

A crane with a steel cable of length 11 m and radius 2.0 cm is employed to lift a block of
concrete of mass 40 tons in a building site. If the Young's modulus of steel is 2.0 x 1011
Pa, what will be idughly the increase in the length of the cable while lifting the block?
(Take g=10 m s-)
(A) 0.75 cm (B)1.25 cm
(C) 1.75 cm (D) 2.50 cm​

Answer 1

Explanation:

Length of cable,

radius of cable,

Young's modulus of steel,

; increase in length,

Mass of block,

As ,